1. An Introduction to the Human Body
Anatomy
science of structure
relationships revealed by dissection (cutting apart)
imaging techniques
Physiology
science of body functions
normal adult physiology is studied in this class
some genetic variations occur

2. ANATOMY AND PHYSIOLOGY DEFINED
the study of structure and the relationships among structures.
Subdivisions
surface anatomy, gross anatomy, systemic anatomy, regional anatomy, radiographic anatomy, developmental anatomy, embryology, cytology, and pathological anatomy

3. ANATOMY AND PHYSIOLOGY DEFINED
the study of how body structures function
Subdivisions of physiology include
cell physiology, systems physiology, pathophysiology, exercise physiology, neurophysiology, endocrinology, cardiovascular physiology, immunophysiology, respiratory physiology, renal physiology, and reproductive physiology

4. Structural Organization of Matter
Chemical Level
a. Atoms
(Proton, Neutron, electrons)
b. Molecules
(Two or more atoms joined together by either covalent or ionic bonds)
Four biologically important organic molecules in the human body
a. Proteins which are made from 20 different Amino Acids

5. Structural Organization of Matter
Four Biologically-Important Organic molecules:
b. Complex Carbohydrates
made from simple sugars
c. Nucleic Acids made for nucleotides
d. Lipids made from fatty acids and glycerol
2. Cells
(Smallest structural and functional units of the human body)

6. Structural Organization of Matter
Tissues
(group of cells and the materials surrounding them that work together to perform a particular function)
Organs
(composed of two or more tissues work together to provide specific functions and they usually have specific shapes)

7. Structural Organization of Matter
Organ systems
(consist of one or more organs that provide a common function) Examples covered in Anatomy & Physiology 242:
a. Integumentary system
b. Skeletal system
c. Muscular system
d. Nervous system

8. Structural Organization of Matter
Anatomy & Physiology 243:
e. Endocrine system
f. Cardiovascular system
g. Lymphatic system
h. Respiratory system
I. Digestive system
j. Urinary system
k. Reproductive system

9. Basic Life Processes Metabolism Responsiveness
Sum of all biochemical processes of cells, tissues, organs, and organ systems
Responsiveness
Ability to detect and respond to changes in the internal and external environment
Movement
Occurs at the intracellular, cellular, organ levels

10. Basic Life Processes Growth
Increase in number of cells, size of cells, tissues, organs, and the body. Single cell to multicellular complex organism
Differentiation
Process a cell undergoes to develop from a unspecialized to a specialized cell
Reproduction
Formation of new cells for growth, repair, or replacement, or the production of a new individual.

11. Basic Life Processes Homeostasis
Equilibrium of the body’s internal environment produced by the interaction of organ systems and regulatory processes (feedback systems).
Homeostasis is a dynamic condition in response to changing conditions.
The two body systems that largely control the body’s homeostatic state:
1. Nervous system
2. Endocrine system

12. Control of Homeostasis
Homeostasis is continually being disrupted by
external stimuli
intense heat, cold , and lack of oxygen
internal stimuli
psychological stresses
exercise
Disruptions are usually mild & temporary
If homeostasis is not maintained, death may result

13. CONTROL OF HOMEOSTASIS
Homeostatic imbalances occur because of disruptions from the external or internal environments.
Homeostasis is regulated by the nervous system and endocrine system, acting together or independently.
The nervous system detects changes and sends nerve impulses to counteract the disruption.
The endocrine system regulates homeostasis by secreting hormones.
Whereas nerve impulses cause rapid changes, hormones usually work more slowly.
Examples: CO2, O2, temperature, pH, blood pressure, …

14. Example of Homeostasis Fluid balance in the Body
Compartments for Body Fluids
Intracellular
Extracellular
a. Interstitial
b. Plasma

15. Components of Feedback Loop
Receptor
monitors a controlled condition
Control center
determines next action
Effector
receives directions from the control center
produces a response that changes the controlled condition

16. Basic Components of a Negative Feedback System

17. Basic Components of a Positive Feedback System

18. Homeostatic Imbalances
Disruption of homeostasis can lead to disease and death.
Disorder is a general term for any change or abnormality of function.
Disease is a more specific term for an illness characterized by a recognizable set of signs and symptoms.
A local disease is one that affects one part or a limited region of the body.
A systemic disease affects either the entire body or several parts.

19. Homeostatic Imbalances
Disease is a more specific term for an illness characterized by a recognizable set of signs and symptoms.
Signs are objective changes that a clinician can observe and measure; e.g., fever or rash.
Symptoms are subjective changes in body functions that are not apparent to an observer; e.g., headache or nausea.
Diagnosis is the art of distinguishing one disease from another or determining the nature of a disease; a diagnosis is generally arrived at after the taking of a medical history and the administration of a physical examination.

20. Anatomical Position
The anatomical position is a standardized method of observing or imaging the body that allows precise and consistent anatomical references.
When in the anatomical position, the subject stands (Figure 1.5).
standing upright
facing the observer, head level
eyes facing forward
feet flat on the floor
arms at the sides
palms turned forward (ventral)

21. Basic Anatomical Terminology

22. Basic Anatomical Terminology

23. Reclining Position
If the body is lying face down, it is in the prone position.
If the body is lying face up, it is in the supine position.

24. Basic body planes or sections
These terms are used for planes or sections that cut the body, organs, tissues, or cells

25. Example of how planes would cut the brain

26. Two Principal Body Cavities and their Subdivisions

27. Directional Terms Used to Describe the Position of one Structure to Another
Superior/Inferior
(Cephalic/Caudal)
Anterior/Posterior
(Ventral/Dorsal)
Medial/Lateral
Intermediate: Between
Ipsilateral/Contralateral
Proximal/Distal
Superficial/Deep

28. Methods of dividing the Abdominopelvic cavity